Sara X Mills, whose video of her jiggling her breasts to the sound of the Russian composer's Eine kleine Nachtmusik has been viewed more than seven million times in just three days, told how the career enabled her to strengthen her pectoral muscles so when she had implants, she was able to move them naturally.

The tattooed American also told how it was her personal trainer who first realised she was able to do the trick.

Speaking this evening, Sara said: “It sort of naturally happens, I was a dancer, that's actually why I had implants. I had really strong pectoral muscles from doing pole dancing and once I got the implants and would do the flexing I used to do [it] meant I could move these giant implants.”

When asked by US website TMZ if she can make them go in different directions, like bodybuilders can do, she replied yes, though admitted it's “gross” when she flexes them really hard.

Sara said: “Essentially I do what bodybuilders do, so when I flex them really hard it's actually quite gross. I used to go to a personal trainer and he would watch me do stuff with my chest, then someone told me it was a bad thing, it wasn't supposed to happen.”

She also revealed how her fans across the world were disappointed to discover her boobs are fake. Though, she admits she is chuffed to have the implants and went as far as to say she is proud of her 36DD breasts.

“I have sub pectoral implants, something called displacement so when I flex my pectoral muscles they flip to the side,” said Sara, 27.

“My fans were upset to find that my boobs aren't real but I'm proud of the fact that I have fake boobs, it says something about my doctor that they don't guess.”

Sara revealed that she picked Mozart's traditional and iconic song because it was the “first public domain song I could find.”

She is now delighted that so many are enjoying her talent and took the opportunity to thank her supporters, saying: “I have a lot of fans and I would like to say thank you to everybody.”

And not forgetting to get a plug in for her Instagram page, she said: “I model, I tattoo model I have a lot of covers and I have an instragram account, sarahontheinternet.”